Choose the one alternative that best completes the statement or answers the ques

Question

Choose the one alternative that best completes the statement or answers the question. Two light bulbs, B_2 and B_2, a re connected to a battery having no appreciable internal resistance as 1) shown in Fig. 26.5. What happens to the brightness of bulb B_1 when we close the switch S? The brightness increases permanently. The brightness does not change. The brightness decreases permanently. The brightness increases temporarily but gradually decreases back to its original brightness. The brightness decreases temporarily but gradually increases back to its original brightness.

Explanation / Answer

Correct answer is B.

Bulbs are parallel connected and are fed with the same tension (the battery one)

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